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| dc.contributor.author | Yimam, Seid Ali | |
| dc.date.accessioned | 2023-06-16T07:08:19Z | |
| dc.date.available | 2023-06-16T07:08:19Z | |
| dc.date.issued | 2023-03 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/15371 | |
| dc.description.abstract | In Ethiopia the use of groundwater for agriculture is very low. Many irrigation schemes obtain water from river diversions in which only farmers with land near the rivers gets profit from irrigation, while others are waiting for the rainy season rather than using groundwater for irrigation. There is high degree of rainfall variability and unreliability. As the irrigation water requirement increases by an expanding number of farmers, the stream flow has decreased significantly this can cause conflict among the upstream and downstream water users. This study was conducted in Awash Basin of Ethiopia to assess suitable land for surface irrigation using shallow groundwater potential. AGIS based Multi-Criteria Evaluation techniques was applied to assess suitable land for irrigation, to increase agricultural productivity, creating food self-sufficiency, overcome the conflict between river water users and to involve farmers those waiting for rain season. Key factors that significantly affect irrigation suitability evaluated in this study include groundwater depth, geology, groundwater yield, slope, soil capability index, population density, rainfall deficit, drainage density, land use/land cove, and road. Pair-wise cooperation matrix and expert’s option were used to assign weights for each factor and then overlaid all factors to identify suitable land for irrigation. CROPWAT 8.0 model was used to calculate reference evapotranspiration utilizing groundwater resources as complementary irrigation to increase income of farmers and as supplemental irrigation to reduce the failure of crop during shortage of rainfall. The available groundwater potential was estimated from British Geological survey data. The study indicated that the suitable land of the basin with shallow groundwater were about 11908.99km 2 or 10.45% of the total area. 1548.17km 2 or 13.18% of the suitable land can be irrigated with the available shallow groundwater. The validation result showed that 72.9% of the actual well data were correctly failed on the suitable area. The estimated total groundwater storage ranges between1Mm 3 /km 2 to 50Mm 3 /km 2 and the borehole yield over the growing period of dominant crop were ranges from 1166 to 233280m 3 /km 2 . The total Net Irrigation Requirements over the growing period of dominant crop were ranges from 144.00mm to 10329.30mm. The evaluation between available groundwater potential and total Net irrigation water requirement showed that shallow groundwater alone may not be sufficient to supply all suitable land of the basin. Keywords: Awash basin, shallow Groundwater irrigation, ArcGIS, AHP, CWR | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Civil and Water Resources Engineering | en_US |
| dc.title | ASSESSMENT OF SUITABLE LAND FOR SURFACE IRRIGATION USING SHALLOW GROUNDWATER POTENTIAL: IN AWASH RIVER BASIN, ETHIOPIA | en_US |
| dc.type | Thesis | en_US |
